title: Human uncoupling protein 2 and 3 genes are associated with obesity in Japanese.
abstract: Human uncoupling proteins (UCPs) are mitochondrial proteins that are involved in the control of energy metabolism and the pathophysiology of obesity. Although there have been several reports on the association between the UCP2/UCP3 locus and the obesity, there have been no haplotype-based case-control studies with gender-specific analysis. The aim of this study was to examine whether there is an association between the UCP2/UCP3 locus and the obesity in the Japanese population when using a single nucleotide polymorphism (SNP)-based and haplotype-based case-control study with gender-specific analysis. We examined a group consisting of 551 subjects, of which 369 were non-obese and 182 were overweight and/or obese. We selected one nonsynonymous SNP (rs660339: Ala55Val) as a genetic marker. Genotyping for all subjects was performed by the TaqMan polymerase chain reaction (PCR) method. Although the overall distributions of genotype and allele were not significantly different between the non-obese and the obese groups, the overall distributions of the genotype were significantly different in men (P = 0.030). In the obese group, male subjects with the Val allele were significantly more frequent in both association studies. There was a significant difference in the overall distribution of the haplotype (UCP3 rs180049, UCP3 rs2075577, UCP2 rs660339) between the weight groups (P = 0.010), and in women, there was a significant difference (P = 0.042) in the overall distribution of the haplotype (UCP3 rs2075577, UCP2 rs660339). Nonsynonymous rs660339 in the human UCP2 gene in men, and the haplotype (UCP3 rs2075577-UCP2 rs660339) in women might be good obesity markers.
authors.affiliation: Division of Nephrology and Endocrinology, Department of Medicine, Nihon University School of Medicine, Tokyo, Japan.
authors.forename: Kotoko
authors.initials: K
authors.lastname: Kosuge
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Soma
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Nakayama
authors.forename: Noriko
authors.initials: N
authors.lastname: Aoi
authors.forename: Mikano
authors.initials: M
authors.lastname: Sato
authors.forename: Akira
authors.initials: A
authors.lastname: Haketa
authors.forename: Jiro
authors.initials: J
authors.lastname: Uwabo
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Izumi
authors.forename: Koichi
authors.initials: K
authors.lastname: Matsumoto
mesh_terms: D015992:Body Mass Index; D016022:Case-Control Studies; D005260:Female; D005819:Genetic Markers / Q000502:physiology; D020022:Genetic Predisposition to Disease; D006239:Haplotypes; D006801:Humans; D007473:Ion Channels / Q000235:genetics*; D007564:Japan; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D024101:Mitochondrial Proteins / Q000235:genetics*; D009765:Obesity / Q000235:genetics*; D050177:Overweight / Q000235:genetics; D020641:Polymorphism, Single Nucleotide; D000071246:Uncoupling Protein 2; D000071247:Uncoupling Protein 3
chemical_list: D005819:Genetic Markers; D007473:Ion Channels; D024101:Mitochondrial Proteins; C000604389:UCP2 protein, human; C000604392:UCP3 protein, human; D000071246:Uncoupling Protein 2; D000071247:Uncoupling Protein 3